MVCC 中文名称叫多版本并发控制，是InnoDB 引擎为了提高执行事务的并发效率引入的概念。多版本的含义就是一条数据被多个事务修改后，在事务还没有被提交前，存在多个版本。MVCC 的实现机制就是通过版本链把多个版本连接起来。 大家好，我是君哥。

A life-sized holographic police officer has been installed in central Seoul in a bid to deter crime. The hologram is projected every two minutes from 19:00 to 22:00 in Jeo-dong Park, an area which is ...

A scavenger hunt campaign to promote Taylor Swift’s new album, The Life of a Showgirl, resulted in a viral #SwiftiesAgainstAI campaign. “The first sign that it was AI was that it didn’t look great,” ...

OpenAI launched an agent builder that the company hopes will eliminate fragmented tools and make it easier for enterprises to utilize OpenAI’s system to create agents. AgentKit, announced during ...